The decrease was part of a broad trend, as the yields of several other vulnerable eurozone members, including Spain and Italy, dropped to new record lows.

The spread between the Slovenian bonds and the 10-year German bunds, which command the lowest yield in the eurozone, was at 1.51 percentage points.

Analysis attribute today's drops to a relatively poor demand and European Central Bank (ECB) boss Mario Draghi's statement that the ECB would act if the eurozone entered a spiral of deflation, according to the French press agency AFP.

Draghi told the German newspaper Handelsblatt that the eurozone was facing an increasing risk of unstable prices, which fuels a fear of deflation.

The analysts believe the ECB could announce new measures, such as the purchase of state bonds, as early as 22 January.